- Why can’t ordinary software tools restore files from RAID?
- How to take hard disks out of the NAS and connect them to a PC?
Why can’t ordinary software tools restore files from RAID?
Conventional hard disks keep user’s data by writing it to their surface in a consecutive way, and this is how an entire file is stored on a single hard disk. However, when data is written to a RAID system, a file is divided into several parts. Then these parts are written consecutively to all hard disks within such array. The size of such parts may range from 2 KB to 2 MB, so each file is stored on several hard disks at the same time.
Such approach helps to speed up read and write operations, and it is evident that saving two parts of a file having the size of 1 GB to two hard disks simultaneously is much faster than saving the same 1 GB of data to one hard disk. However, this peculiarity makes file recovery more complicated.
Various RAID levels store information in different ways. Additionally, manufacturers like LaCie also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.
How can data fragmentation impact the read and write speeds, and potential data loss on NAS LaCie 2big RAID (STHJ4000800 / STHJ40000800 / STHJ8000800 / STHJ36000800 / STHJ28000800 / STHJ16000800) devices?
Data fragmentation can have several impacts on read and write speeds, as well as potential data loss, on NAS LaCie 2big RAID devices. Here are the implications:
- Read and Write Speeds: Fragmentation occurs when files are stored in non-contiguous blocks on a storage device. This can lead to slower read and write speeds on the NAS device. When a file is fragmented, the hard drive's read/write head needs to move to different physical locations to access all the fragments, causing latency and reducing overall performance.
- Disk Space Efficiency: Fragmentation can also lead to inefficient disk space utilization. As files become fragmented, the available free space on the NAS device is scattered across the disk, resulting in wasted storage capacity. This can limit the amount of data that can be stored and impact the overall efficiency of the device.
- Data Loss Risk: Fragmentation increases the risk of data loss. When files are fragmented, the chances of file corruption or errors during read and write operations are higher. If a fragmented file is not properly stored or retrieved, it can result in data loss or data corruption, making it difficult or impossible to access the file.
To mitigate these impacts, it is recommended to regularly defragment the NAS device. Defragmentation rearranges fragmented files, placing them in contiguous blocks on the disk, which improves read and write speeds and reduces the risk of data loss. Additionally, ensuring sufficient free space on the NAS device can also help minimize fragmentation.
How to take hard disks out of the NAS and connect them to a PC?
Although NAS 2big RAID (STHJ4000800 / STHJ40000800 / STHJ8000800 / STHJ36000800 / STHJ28000800 / STHJ16000800) can be accessed over the network, you still need to take the hard disks out of the storage device and connect them to a Windows computer. Only in this case will the software be able to scan them properly. Here is what you should do:
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Turn off the storage and disconnect it from the power supply.
WARNING! Before you start taking hard disks out of your NAS device, read the manual carefully. Incorrect actions may damage your network-attached storage and/or the hard disks within the RAID system.
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Take the hard disks out of the NAS one by one, carefully removing them from their slots. Remember that the disks are extremely vulnerable: hitting or dropping them may result in serious physical damage.
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Make sure to mark each hard disk in accordance with how they were installed inside the NAS.
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Remove the hard disks and connect them to the computer. In this video, we have explored what ports are used to connect hard disks, and what to do if there are not enough ports or connectors.
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Restoring data with Hetman RAID Recovery
This program recovers data from damaged RAID arrays and is fully compatible with LaCie 2big RAID (STHJ4000800 / STHJ40000800 / STHJ8000800 / STHJ36000800 / STHJ28000800 / STHJ16000800). The hard disks that make up the RAID contain technical information about the algorithm used to save files. When launched, Hetman RAID Recovery reads this information and puts the damaged array together. Then you can open the disk and save your files. Also, you can recover the files accidentally deleted from the network drive.
2big RAID (STHJ4000800 / STHJ40000800 / STHJ8000800 / STHJ36000800 / STHJ28000800 / STHJ16000800) has 2 HDD slots, and it supports the following array types:
- RAID 0;
- RAID 1;
- JBOD;
NAS supports:
- exFAT, VFAT, FAT 12 / 16 / 32;
- NTFS / ReFS;
- APFS / HFS+;
- Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
- VMFS / HikvisionFS;
Safe recovery from disk images
This utility lets you save an entire copy of the disk to file and then work with this image instead of the actual disk. Such feature helps to protect data on the disk from:
- Overwriting during the recovery process;
- Loss resulting from bad sectors;
- User mistakes.
To create an image, do the following:
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Make sure that you have enough free space to save the image. The image file size usually equals the disk size.
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Select the disk in the main window, and choose from the menu Tools – Save Disk. You can select multiple disks to be saved.
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When the image creation wizard starts, you can choose to save the entire disk or select only a part of it. Specify the parameters and click Next.
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At this stage, you need to choose a directory where to save the image. Choose any disk connected to this PC, or save the image by FTP.
Where are user’s files stored?
The LaCie 2big RAID (STHJ4000800 / STHJ40000800 / STHJ8000800 / STHJ36000800 / STHJ28000800 / STHJ16000800) network-attached storage keeps LaCie NAS OS operating system files on a separate RAID 1 (mirrored) array. Usually, all NAS systems create several volumes on every hard disk, and the first of them takes up to 2 Gb of space. This is where operating system files are stored. Other volumes are united into a RAID array where user’s data is written.
Comparison of software for RAID recovery
Product | Operating system | License type | RAID controller support | Supported file systems | Virtual RAID controller support | Data recovery from damaged RAID | File preview |
---|---|---|---|---|---|---|---|
Hetman RAID Recovery | Windows | Paid | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
DiskInternals RAID Recovery | Windows | Paid | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | No | Yes | Yes |
R-Studio | Windows, Mac, Linux | Paid | Yes, over 200 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
UFS Explorer RAID Recovery | Windows, Mac, Linux | Paid | Yes, over 1,000 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
EaseUS Data Recovery | Windows | Paid | Yes, over 20 controllers | FAT, NTFS, Ext2/3/4, HFS+ | No | Yes | Yes |
ReclaiMe Free RAID Recovery | Windows | Free | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
Yes, there are specific techniques used in data recovery from NAS LaCie 2big RAID devices with RAID configurations. Here are some common techniques:
It is important to note that data recovery from RAID systems can be complex and should be performed by experienced professionals to avoid further data loss or damage.